Concussion in sport - 6 Minute English

Vocabulary concussion a type of traumatic brain injury caused by a bump or blow to the head (to be) off bad or worse than usual; below the usual standard warped strange and unpleasant pick up the pieces try to return to normality after a crisis or collapse bright as a button very happy and cheerful, intelligent, and full of energy reserve supply of something that is kept and stored for future use